U.S. patent application number 14/060616 was filed with the patent office on 2014-04-24 for touch screen panel.
This patent application is currently assigned to DONGWOO FINE-CHEM CO., LTD.. The applicant listed for this patent is DONGWOO FINE-CHEM CO., LTD.. Invention is credited to Jong Min KIM, Seung Kook KIM, Dae Chul PARK.
Application Number | 20140111962 14/060616 |
Document ID | / |
Family ID | 50485141 |
Filed Date | 2014-04-24 |
United States Patent
Application |
20140111962 |
Kind Code |
A1 |
PARK; Dae Chul ; et
al. |
April 24, 2014 |
TOUCH SCREEN PANEL
Abstract
A touch screen panel is provided with electromagnetic wave
shielding properties. The touch screen panel includes an
electromagnetic wave shielding layer on a window substrate. The
electromagnetic wave shielding layer may include at least one alloy
selected from the group consisting of copper, iron, nickel,
aluminum, tin, indium, zinc, gold and silver, and oxides thereof,
as an electromagnetic wave shielding material. The electromagnetic
wave shielding layer may include at least one electromagnetic wave
shielding material selected from the group consisting of
polypyrrole, polythiophene, and polyaniline. When the touch screen
panel further includes an index matching layer, the electromagnetic
wave shielding layer may be formed on at least one face of the
index matching layer. When electromagnetic wave shielding material
is included in the index matching layer, the index matching layer
functions as the electromagnetic wave shielding layer.
Inventors: |
PARK; Dae Chul; (Seoul,
KR) ; KIM; Seung Kook; (Seoul, KR) ; KIM; Jong
Min; (Jeollabuk-do, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
DONGWOO FINE-CHEM CO., LTD. |
Jeollabuk-do |
|
KR |
|
|
Assignee: |
DONGWOO FINE-CHEM CO., LTD.
Jeollabuk-do
KR
|
Family ID: |
50485141 |
Appl. No.: |
14/060616 |
Filed: |
October 23, 2013 |
Current U.S.
Class: |
361/818 |
Current CPC
Class: |
G06F 3/041 20130101;
H05K 9/00 20130101; G06F 2203/04107 20130101 |
Class at
Publication: |
361/818 |
International
Class: |
H05K 9/00 20060101
H05K009/00 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 23, 2012 |
KR |
10-2012-0117681 |
Claims
1. A touch screen panel, comprising: an electromagnetic wave
shielding layer on a window substrate.
2. The touch screen panel according to claim 1, wherein the
electromagnetic wave shielding layer includes at least one alloy
selected from the group consisting of copper, iron, nickel,
aluminum, tin, indium, zinc, gold and silver, and oxides thereof,
as an electromagnetic wave shielding material.
3. The touch screen panel according to claim 1, wherein the
electromagnetic wave shielding layer includes at least one
electromagnetic wave shielding material selected from the group
consisting of polypyrrole, polythiophene, and polyaniline.
4. The touch screen panel according to claim 1, further comprising
an index matching layer, the electromagnetic wave shielding layer
formed on at least one face of the index matching layer.
5. The touch screen panel according to claim 4, wherein the index
matching layer includes niobium oxide or silicon oxide, or a
mixture thereof.
6. The touch screen panel according to claim 1, wherein the
electromagnetic wave shielding layer is formed directly on at least
one face of a window substrate.
7. The touch screen panel according to claim 1, further comprising
an insulating layer, the electromagnetic wave shielding layer
formed on at least one face of the insulating layer.
8. The touch screen panel according to claim 4, wherein the
electromagnetic wave shielding layer is formed from a composition
comprising an electromagnetic wave shielding material, binder resin
and solvent.
9. The touch screen panel according to claim 1, wherein the
electromagnetic wave shielding layer is an index matching
layer.
10. The touch screen panel according to claim 9, wherein the index
matching layer includes an electromagnetic wave shielding
material.
11. The touch screen panel according to claim 9, wherein the index
matching layer is prepared by combining niobium oxide or silicon
oxide with electromagnetic wave shielding material.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to Korean Patent
Application No. 10-2012-0117681, filed on Oct. 23, 2012, in the
Korean Intellectual Property Office, the entire disclosure of which
is incorporated herein by reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a touch screen panel.
[0004] 2. Description of the Related Art
[0005] A touch screen is a screen equipped with a special input
device to receive positional input(s) by touching the screen with a
finger or a stylus pen.
[0006] The touch screen does not use a keyboard, but instead has a
configuration of multi-layer laminates wherein, when the finger of
a human or an object, such as a stylus pen, touches a specific
character or position displayed on a screen, the touch screen
identifies the position and directly receives data through the
screen picture, in order to practically treat the data by software
stored therein.
[0007] A conventional touch screen has been manufactured by first
preparing an indium-tin oxide (ITO) film and a window substrate,
via their respective processes, followed by the combination of the
two. However, in recent years, the window substrate has been
integrated with the ITO film through a series of processes.
[0008] Touch screen panels having a window substrate and different
layers, such as an electrode pattern layer laminated on the window
substrate, or the like, are typically driven by DC or AC voltages
applied to an electrode pattern or liquid crystal cell. During such
processes, electromagnetic waves are emitted.
[0009] Problems associated with electromagnetic interference may
include, for example, (1) health impairments, (2) electromagnetic
wave malfunction, and (3) substrate penetration, or the like.
Regarding health impairments, high frequency waves are easily
absorbed into the human body and may generate resonance depending
upon the amplitude of the frequency or the tissue-type within the
human body, hence, causing hot-spot effects. Therefore, a mobile
phone may negatively affect the head of a user. On the other hand,
low frequency waves have high penetration in terms of the human
body and, in particular, the carcinogenic effects of magnetic
fields are troublesome.
[0010] Electromagnetic wave malfunction causes problems associated
with other instruments malfunctioning due to the electromagnetic
waves emitted from alternate electronic devices. The prohibition of
using a mobile phone inside a hospital or an airplane is now
commonplace because the above described interference increases the
probability of not only a relatively minor accident, but also the
potential for a serious accident that may be life threatening.
[0011] With reference to substrate penetration problems, since the
electromagnetic waves emitted from a computer or an internal
(in-house) local area network (LAN) can be intercepted with an
antenna gathering information from the same, problems caused by the
above conditions are often pointed out.
SUMMARY
[0012] Accordingly, an object of the present invention is to
provide a touch screen panel having an electromagnetic wave
shielding capability.
[0013] The touch screen panel of the present invention may have an
electromagnetic wave shielding layer to prevent the malfunction of
peripheral equipment caused by the emission of electromagnetic
waves, as well as prevent harmful influences on the human body.
[0014] The electromagnetic wave shielding layer may include at
least one alloy selected from the group consisting of copper, iron,
nickel, aluminum, tin, indium, zinc, gold and silver, and oxides
thereof, as an electromagnetic wave shielding material.
[0015] The electromagnetic wave shielding layer may include at
least one electromagnetic wave shielding material selected from the
group consisting of polypyrrole, polythiophene, and
polyaniline.
[0016] The touch screen panel may further include an index matching
layer, and the electromagnetic wave shielding layer may be formed
on at least one face of the index matching layer.
[0017] The index matching layer may include niobium oxide or
silicon oxide, or a mixture thereof.
[0018] The electromagnetic wave shielding layer may be formed
directly on at least one face of a window substrate.
[0019] The touch screen panel may further include an insulating
layer, and the electromagnetic wave shielding layer may be formed
on at least one face of the insulating layer.
[0020] The electromagnetic wave shielding layer may be formed from
a composition comprising an electromagnetic wave shielding
material, binder resin and solvent.
[0021] The electromagnetic wave shielding layer may be an index
matching layer.
[0022] The index matching layer may include an electromagnetic wave
shielding material.
[0023] The index matching layer may be prepared by combining
niobium oxide or silicon oxide with electromagnetic wave shielding
material.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The above and other objects, features, and other advantages
of the present invention will be more clearly understood from the
following detailed description taken in conjunction with the
accompanying drawing, in which:
[0025] FIG. 1 is a schematic perspective view of a mobile phone as
one example to which a touch screen panel of the present invention
is applied.
DETAILED DESCRIPTION
[0026] The present invention discloses a touch screen panel with
electromagnetic wave shielding properties, which includes an
electromagnetic wave shielding layer.
[0027] It will be understood that when an element such as a layer,
film, region, or substrate is referred to as being "on" another
element, it can be directly on the other element or intervening
elements may also be present.
[0028] Hereinafter, the present invention will be described in
detail with reference to the drawing.
[0029] The electromagnetic wave shielding layer, according to the
present invention, is a layer within a touch screen panel laminate
structure provided in the touch screen panel.
[0030] Conventionally, a touch screen panel is formed by laminating
a non-conductive shielding pattern, an index matching layer, an
electrode pattern layer, an insulating layer, and the like, in
sequential order, on one face of a window substrate and configured
as the outermost part of the panel. Electromagnetic waves are
emitted from an electrode and/or circuit board among the
configurable elements of the touch screen panel. Accordingly, the
electromagnetic wave shielding layer may be placed between an
electromagnetic wave emission part and a user.
[0031] According to one embodiment of the present invention, an
electromagnetic wave shielding layer may be provided on at least
one face of a window substrate. In the case where the
electromagnetic wave shielding layer is formed on the face of the
window substrate at the user side, the electromagnetic wave
shielding layer may be connected to a ground electrode by providing
a wire on an external frame of an electronic device to fix the
window substrate. In the case where the electromagnetic wave
shielding layer is formed on the inner panel side of the window
substrate, after forming holes in a non-conductive shielding
pattern, and filling the holes with a conductive material to apply
an electric current to the electromagnetic wave shielding layer,
the conductive material may be connected to the ground
electrode.
[0032] According to another preferred embodiment of the present
invention, an electromagnetic wave shielding layer may be provided
on at least one face of an index matching layer. However, as shown
in FIG. 1, the window substrate may be separated into a display
part and a non-display part. In the non-display part, a
non-conductive shielding pattern used to hide an inner electrode
pattern or circuit board is first formed thereon, and then, an
index matching layer is formed on the non-conductive shielding
pattern. In this case, the electromagnetic wave shielding layer may
be connected to a ground electrode by connecting a wire to a
lateral side of the electromagnetic wave shielding layer.
[0033] According to another embodiment of the present invention, an
electromagnetic wave shielding layer may be provided on at least
one face of an insulating layer in a touch screen panel
laminate.
[0034] According to the above embodiments of the present invention,
the electromagnetic wave shielding layer, formed as a layer within
the structure of the touch screen panel laminate, may be provided
by application of a composition for forming an electromagnetic wave
shielding layer. The composition for forming an electromagnetic
wave shielding layer may be prepared by including an
electromagnetic wave shielding material, binder resin and
solvent.
[0035] The electromagnetic wave shielding material may be, without
limitation, any conventional electromagnetic wave material used in
the related art. For instance, the electromagnetic wave shielding
material prepared herein may include at least one electromagnetic
wave shielding material, for example: metallic materials and oxides
thereof, such as an alloy including at least one selected from a
group consisting of copper, iron, nickel, aluminum, tin, indium,
zinc, gold, and silver, etc.; and conductive polymer materials such
as polypyrrole, polythiophene, and polyaniline, etc.
[0036] The binder resin may include a polymer resin that forms a
film, endows adhesion to an adjacent layer, and has moisture
resistance, heat resistance, chemical resistance, and the like. For
instance, acrylate resins, urethane resins, epoxy resins, alkyd
resins, or the like, may be used alone or in combination with two
or more thereof.
[0037] The solvent may dissolve or disperse components in the
composition and endows workability. The solvents available herein
may be, without limitation, water, alcohol, or the like.
[0038] Optionally, the composition for forming an electromagnetic
wave shielding layer may further include various additives
according to the demands thereof. For example, a thickener, an
antioxidant, a surfactant, or the like, may be further included
without limitation.
[0039] Application of the composition for forming an
electromagnetic wave shielding layer may be executed by any
conventional method known in the related art, without limitation.
For example, screen printing, offset printing, spin coating, inkjet
printing, or the like, may be used without limitation.
[0040] According to another embodiment of the present invention, an
index matching layer may also function as an electromagnetic wave
shielding layer. In this case, an index matching layer may be
prepared by including the electromagnetic wave shielding material
described above.
[0041] The index matching layer is generally formed by including
niobium oxide, silicon oxide, or mixtures thereof. Therefore,
according to another embodiment of the present invention, the index
matching layer may be prepared by combining niobium oxide or
silicon oxide with the electromagnetic wave shielding material
described above.
[0042] According to the above embodiments of the present invention,
the electromagnetic wave shielding layer includes an
electromagnetic wave shielding material of a conductive material.
The index matching layer adjacent to the electromagnetic wave
shielding layer, or used as the electromagnetic wave shielding
layer, may be insulated from an electrode pattern layer formed on
the index matching layer. The electromagnetic wave shielding layer,
according to an embodiment of the present invention is formed to
prevent deterioration of insulating properties of the index
matching layer and the electrode pattern layer.
[0043] The electromagnetic wave shielding layer of the present
invention, formed in such a way as described above, may be applied
to a touch screen panel and exhibit the desired electromagnetic
wave shielding effects.
[0044] The touch screen panel, according to the present invention,
may be formed as an alternative layer in a touch screen panel
laminate structure, as described in the embodiments of the present
invention. Otherwise, as described other embodiments of the present
invention, the touch screen panel of the present invention may be
laminated as an index matching layer containing an electromagnetic
wave shielding material. As such, after forming the electromagnetic
wave shielding layer, the touch screen panel of the present
invention may be prepared according to any preparation method
generally used in the related art.
[0045] A window substrate used in the present invention may be
prepared of any material, without limitation, so long as it has
high durability to sufficiently protect the touch screen panel from
external forces, and allows a user to optimally view the display,
and any window substrate used in the art may be adopted without
limitation. For example, glass, polyethersulfone (PES),
polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate
(PEN), polyethylene terephthalate (PET), polyphenylene sulfide
(PPS), polyarylate, polyimide, polycarbonate (PC), cellulose
triacetate (TAC), cellulose acetate propionate (CAP), or the like,
may be used. Glass is used and, more particularly, reinforced glass
is used.
[0046] A non-conductive shielding pattern is formed on the
non-display part of the window substrate according to the present
invention.
[0047] The non-conductive shielding pattern may be formed using a
composition for forming a non-conductive shielding pattern, which
includes a shielding agent, binder resin, polymerizable compound,
polymerization initiator, solvent, and the like.
[0048] The shielding agent used herein may be any shielding agent
used in the related art without limitation. For example, a coloring
agent, carbon black, aniline black, chromium oxide, iron oxide,
titanium black, or mixtures thereof, may be used.
[0049] The coloring agent is without limitation, so long as it can
express the colors required by the user, and may include, for
example, red, green, or blue dyes or pigments; yellow, orange,
violet, or brown dyes or pigments, or a combination of the colors;
black pigments, carbon black, and the like, which can be used alone
or in combination with two or more thereof.
[0050] The coloring agent may further include metal powder, white
pigments, fluorescent pigments, etc., as necessary.
[0051] The pigment may be an inorganic pigment or an organic
pigment.
[0052] Inorganic pigments are without limitation and may include,
for example, barium sulfate, lead sulfate, titanium oxide, yellow
lead, Bengal lead, calcium carbonate, chromium oxide, carbon black,
or the like.
[0053] Organic pigments are without limitation and may include
pigments listed by Color Index (C.I.) numbers below.
[0054] Yellow pigments may include, for example, C.I. pigment
yellow 1, 2, 3, 4, 5, 6, 12, 13, 14, 16, 17, 24, 55, 65, 73, 74,
81, 83, 87, 93, 94, 95, 97, 100, 101, 105, 108, 109, 110, 116, 120,
127, 128, 129, 133, 138, 139, 147, 148, 150, 151, 153, 154, 155,
166, 168, 169, 170, 172, 173, 174, 175, 176, 180, 185, 193, 194,
202, or the like.
[0055] Orange pigments may include, for example, C.I. pigment
orange 1, 2, 5, 13, 16, 17, 19, 22, 24, 34, 36, 38, 39, 43, 46, 48,
61, 62, 64, 65, 67, 69, 73, 77, or the like.
[0056] Red pigments may include, for example, C.I. pigment red 1,
2, 3, 4, 5, 6, 8, 9, 12, 14, 15, 17, 22, 23, 31, 37, 38, 41, 48:1,
48:2, 48:3, 49, 50:1, 52:1, 53, 57:1, 58:4, 60, 63, 64, 68, 81, 88,
90:1, 112, 114, 122, 123, 144, 146, 147, 149, 150, 151, 166, 168,
170, 175, 176, 177, 178, 179, 181, 185, 187, 188, 190, 193, 194,
202, 207, 208, 209, 214, 216, 220, 221, 224, 242, 243, 245, 247,
254, 255, 264, 272, or the like.
[0057] Violet pigments may include, for example, C.I. pigment
violet 1, 2, 3, 5, 19, 23, 29, 31, 32, 37, 39, 50, or the like.
[0058] Blue pigments may include, for example, C.I. pigment blue 1,
15:1, 15:2, 15:3, 15:4, 15:6, 16, 17, 25, 56, 60, 66, 75, 79, or
the like.
[0059] Green pigments may include, for example, C.I. pigment green
2, 7, 8, 13, 36, 54, or the like.
[0060] Brown pigments may include, for example, C.I. pigment brown
1, 22, 23, 25, 27, or the like.
[0061] Black pigments may include, for example, C.I. pigment black
1, 7, 31, 32, or the like.
[0062] The kinds of dyes are without limitation and may include,
for example, azo dyes, anthraquinone dyes, phthalocyanine dyes,
quinonimine dyes, quinoline dyes, nitro dyes, carbonyl dyes,
methyne dyes, or the like.
[0063] The azo dyes are without limitation and may include, for
example, C.I. acid yellow 11, C.I. acid orange 7, C.I. acid red 37,
C.I. acid red 180, C.I. acid blue 29, C.I. direct red 28, C.I.
direct red 83, C.I. direct yellow 12, C.I. direct orange 26, C.I.
direct green 28, C.I. direct green 59, C.I. reactive yellow 2, C.I.
reactive red 17, C.I. reactive red 120, C.I. reactive black 5, C.I.
disperse orange 5, C.I. disperse red 58, C.I. disperse blue 165,
C.I. basic blue 41, C.I. basic red 18, C.I. mordant red 7, C.I.
mordant yellow 5, C.I. mordant black 7, or the like.
[0064] The anthraquinone dyes are without limitation and may
include, for example, C.I. bat blue 4, C.I. acid blue 40, C.I. acid
green 25, C.I. creative blue 19, C.I. creative blue 49, C.I.
disperse red 60, C.I. disperse blue 56, C.I. disperse blue 60, or
the like.
[0065] The phthalocyanine dyes are without limitation and may
include, for example, C.I. pad blue 5, or the like.
[0066] The quinonimine dyes are without limitation and may include,
for example, C.I. basic blue 3, C.I. basic blue 9, or the like.
[0067] The quinoline dyes are without limitation and may include,
for example, C.I. solvent yellow 33, C.I. acid yellow 3, C.I.
disperse yellow 64, or the like.
[0068] The nitro dyes are without limitation and may include, for
example, C.I. acid yellow 1, C.I. acid orange 3, C.I. disperse
yellow 42, or the like.
[0069] Particular non-limited examples of the above dyes, pigments,
and carbon black may include Mitsubishi carbon black M1000,
Mitsubishi carbon black MA-100, Mitsubishi carbon black #40,
Vitoria pure blue (42595), oramine 0 (41000), catilon brilliant
flavine (basic 13), rhodamine 6GCP (45160), rhodamine B (45170),
sakuranin OK 70:100 (50240), erioglaucine X (42080), NO. 120/Lionel
yellow (21090), Lionel yellow GRO (21090), symuler fast yellow GRO
(21090), symuler fast yellow 8GF (21105), benzidine yellow 4J-564D
(21095), paliotol yellow L0960 (pigment yellow 139), yellow pigment
E4-GN (pigment yellow 150 derivative), symuler fast red 4015
(12355), Lionel red 7B4401 (15850), fastogen blue JGR-L (74160),
Lionel blue SM (26150), Lionel blue ES (pigment blue 15:6, pigment
blue 1536), lionogen red GD (pigment red 168, pigment red 108),
chromophthal red A2B (pigment red 177), ilgapore red B-CF (pigment
red 254), heliogen green L8730 (pigment green 7), Lionel green 2YS
(pigment green 36), or the like.
[0070] The binder resin plays a role in supporting the pattern and
may be a copolymer of a monomer having a carboxyl group, and
another monomer having an unsaturated bond.
[0071] The monomer having a carboxyl group is an unsaturated
carboxylic acid having at least one carboxyl group in the molecule
and may include, for example, monocarboxylic acids such as acrylic
acid, methacrylic acid, crotonic acid, etc.; dicarboxylic acids
such as fumaric acid, metaconic acid, itaconic acid, etc.; and the
anhydrides thereof, and the like.
[0072] The monomers having an unsaturated bond are without
limitation so long as they are any monomer having an unsaturated
double bond copolymerizable with the monomer having the carboxyl
group. Particular examples thereof may include unsaturated
carboxylic acid ester compounds, such as methyl(meth)acrylate,
ethyl(meth)acrylate, butyl(meth)acrylate,
2-hydroxyethyl(meth)acrylate, etc.; unsubstituted or substituted
alkylester compounds of unsaturated carboxylic acids, such as
aminoethyl(meth)acrylate; unsaturated carboxylic acid ester
compounds having alicyclic substituents, such as
cyclopentyl(meth)acrylate, cyclohexyl(meth)acrylate,
methylcyclohexyl(meth)acrylate, cycloheptyl(meth)acrylate,
cyclooctyl(meth)acrylate, cyclopentenyl(meth)acrylate,
cyclohexenyl(meth)acrylate, cycloheptenyl(meth)acrylate,
cyclooctenyl(meth)acrylate, isobornyl(meth)acrylate,
adamantyl(meth)acrylate, norbornyl(meth)acrylate, etc.; unsaturated
carboxylic acid ester compounds having thermo-curable substituents,
such as 3-methyl-3-(meth)acryloxymethyloxetane,
3-ethyl-3-(meth)acryloxymethyloxetane,
3-methyl-3-(meth)acryloxyethyloxetane, etc.; unsaturated glycidyl
carboxylic acid ester compounds, such as glycidyl(meth)acrylate,
etc.; unsaturated carboxylic acid ester compounds having aromatic
ring-containing substituents, such as benzyl(meth)acrylate,
phenoxy(meth)acrylate, etc.; aromatic vinyl compounds, such as
styrene, vinyl toluene, .alpha.-methyl styrene, etc.; carboxylic
acid vinylesters, such as vinyl acetate, vinyl propionate, etc.;
cyanated vinyl compounds, such as (meth)acrylonitrile,
.alpha.-chloroacrylonitrile, etc., which can be used alone or in
combination with two or more thereof.
[0073] Examples of the copolymer may include
3-ethyl-3-methacryloxymethyloxetane/benzyl methacrylate/methacrylic
acid copolymer, 3-ethyl-3-methacryloxymethyloxetane/benzyl
methacrylate/methacrylic acid/styrene copolymer,
3-ethyl-3-methacryloxymethyloxetane/methyl methacrylate/methacrylic
acid copolymer, 3-ethyl-3-methacryloxymethyloxetane/methyl
methacrylate/methacrylic acid/styrene copolymer, or the like.
[0074] The polymerizable compound is without limitation and may be
any compound generally used in the related art, for example, a
compound having an epoxy group hardened by heat.
[0075] The compound having an epoxy group is without limitation and
may include, for example, a curable monomer having an
epoxy(meth)acrylate group.
[0076] The curable monomer having an epoxy(meth)acrylate group may
be any one selected from commercially available compounds, for
example, a compound having two epoxy acrylate groups or four epoxy
acrylate groups in the molecule.
[0077] The polymerization initiator used herein is without
limitation and may include any one used in the related art, for
example, triazine compounds, acetophenone compounds, xanthone
compounds, benzoin compounds, imidazole compounds, etc., which can
be used alone or in combination with two or more thereof.
[0078] Particular examples of the polymerization initiator may
include 2,4-bistrichloromethyl-6-p-methoxystyryl-s-triazine,
2-p-methoxystyryl-4,6-bistrichloromethyl-s-triazine,
2,4-trichloromethyl-6-triazine,
2,4-trichloromethyl-4-methylnaphthyl-6-triazine, benzophenone,
p-(diethylamino)benzophenone, 2,2-dichloro-4-phenoxyacetophenone,
2,2-diethoxyacetophenone, 2,2-dibutoxyacetophenone,
2-hydroxy-2-methylpropiophenone, p-t-butyl
2,2,2-trichloroacetophenone, 2-methylthioxanthone,
2-isobutylthioxanthone, 2-dodecylthioxanthone,
2,4-dimethylthioxanthone, 2,4-diethylthioxanthone,
2,2'-bis-(2-chlorophenyl)-4,4',5,5'-tetraphenyl-1,2-biimidazole
compounds, etc., which can be used alone or in combination with two
or more thereof.
[0079] The kinds of solvents used herein are without limitation and
may include, for example, ethyleneglycol monoalkylethers, such as
ethyleneglycol monomethylether, ethyleneglycol monoethylether,
ethyleneglycol monopropylether, ethyleneglycol monobutylether,
etc.; diethyleneglycol dialkylethers, such as diethyleneglycol
dimethylether, diethyleneglycol diethylether, diethyleneglycol
dipropylether, diethyleneglycol dibutylether, etc.; alkyleneglycol
alkylether acetates, such as propyleneglycol monomethylether
acetate, propyleneglycol monoethylether acetate, propyleneglycol
monopropylether acetate, etc.; alkyleneglycol alkylethers, such as
propyleneglycol monomethylether, propyleneglycol monoethylether,
propyleneglycol monopropylether, etc.; (alkoxy)alkylesters, such as
ethyl acetate, ethyl lactate, methylcellosolve acetate,
ethylcellosolve acetate, methoxybutyl acetate, methoxypentyl
acetate, etc.; aromatic hydrocarbons, such as benzene, toluene,
xylene, etc.; ketones, such as methylethylketone, acetone,
methylamylketone, methylisobutylketone, cyclohexanone, etc.;
alcohols, such as ethanol, propanol, butanol, hexanol,
cyclohexanol, ethyleneglycol, glycerin, etc., which can be used
alone or in combination with two or more thereof.
[0080] The thickness of a non-conductive shielding pattern may
range from 1 to 10 .mu.m, and preferably ranges from 1 to 5 .mu.m.
When the thickness of the non-conductive shielding pattern is
within the range from 1 to 10 .mu.m, hiding and shielding effects
are attained to mask the inner board and wiring of the device, the
reliability of the conductive electrode pattern layer may be
improved, and a thin touch screen panel may be produced.
[0081] After forming the non-conductive shielding pattern, an
electromagnetic wave shielding layer and an index matching layer
may be further provided, as described above.
[0082] Thereafter, an electrode pattern, an insulating layer, or
the like, may be further provided. The electrode pattern may play a
role in detecting static electricity generated from the body of a
human when his or her finger touches a display part as a touch area
of an image sensor, and converting it to electric signals.
[0083] The conductive material used for forming the electrode
pattern is without limitation and may include, for example,
indium-tin oxide (ITO), indium-zinc oxide (IZO), zinc oxide (ZnO),
indium-zinc-tin oxide (IZTO), cadmium-tin oxide (CTO),
poly(3,4-ethylenedioxythiopene) (PEDOT), carbon nanotube (CNT),
metal wire, etc., which can be used alone or in combination with
two or more thereof.
[0084] Metals used in the metal wire are without limitation and may
include, for example, silver, gold, aluminum, copper, iron, nickel,
titanium, tellurium, chromium, etc., which can be used alone or in
combination with two or more thereof.
[0085] According to the above, an electrode pattern circuit may be
formed on an area corresponding to the non-display part in the
electrode pattern. The electrode pattern circuit plays a role in
delivering the electrical signal generated from the electrode
pattern to a flexible printed circuit board (FPCB), IC chips, or
the like, by touching the display part of the window substrate. The
electrode pattern circuit may be formed of the same materials and
by the same methods as used for forming the electrode pattern.
[0086] Thereafter, a scattering-preventive film may be provided.
The scattering-preventive film may play a role in protecting the
above patterns and preventing the same from being scattered when
the window substrate is broken.
[0087] Materials for the scattering-preventive film are without
limitation so long as they are transparent and provide durability,
and may include, for example, polyethylene terephthalate (PET).
[0088] A method for forming the scattering-preventive film is
without limitation and may include, for example, spin coating, roll
coating, spray coating, dip coating, flow coating doctor blade and
dispensing, inkjet printing, screen printing, pad printing, gravure
printing, offset printing, flexography printing, stencil printing,
imprinting, and the like.
[0089] Next, the electrode pattern circuit may be connected to a
terminal of a printed circuit board. Various types of printed
circuit boards may be used, for instance, a flexible printed
circuit board (FPCB) may be used.
[0090] A touch screen panel prepared by the above processes,
according to the present invention, includes an electromagnetic
wave shielding layer that reduces harmful effects to the human body
while decreasing the malfunction of peripheral electronic devices,
as well as the touch screen panel.
* * * * *